probably the bleeding comes from your gums and not from your tooth.Bleeding gums are mainly due to inadequate plaque removal from the teeth at the gum line or it maybe due to
Other causes of bleeding gums include:
* Any bleeding disorder
* Brushing too hard
* Hormonal changes during pregnancy
* Idiopathic thrombocytopenic purpura
* Ill-fitting dentures
* Improper flossing
* Infection, which can be either tooth- or gum-related
* Leukemia
* Scurvy
* Use of blood thinners
* Vitamin K deficiency
you should brush your teeth gently with a soft-bristle toothbrush after every meal. The dentist may recommend rinsing with salt water or hydrogen peroxide and water. Avoid using commercial, alcohol-containing mouthwashes, which aggravate the problem.
Flossing teeth twice a day can prevent plaque from building up. Avoiding snacking between meals and reducing carbohydrates can also help. Follow a balanced, healthy diet.
I am not a dentist but from my own experience, that could be from an infection of the gums or plaque build up. I would see my dentist. It could also be periodontal disease.